In most cases, the binary attachment is named Winmail.dat, and may include the following information: The formatted text version of the message (for example, font information and colors). OLE objects (for example, embedded pictures and embedded Microsoft Office documents).

When you use Microsoft Office Outlook 2010 or Microsoft Office Outlook 2007 to send an email message, the recipient of the message sees an attachment that is called Winmail.dat. This article helps you fix the problem.

Find and download Windows Live Mail. Windows 10. If you’ve been using Windows Live Mail, you might want to give the Windows Mail app a try. If you sign in to your PC with your Microsoft account, your email address is already set up in the Mail app.

If you are having issues installing or updating Gaming Services on your PC, or if you are noticing that the Xbox app for PC is launching with missing content, you may want to download and run the Gaming Services Repair Tool for PC.

The Internet standards for encoding messages such as Multipart Internet Mail Extensions (MIME) and UUENCODE are used independently of TNEF. TNEF can exist in a MIME-encoded message as a MIME body part of type "application/ms-tnef," or in a UUENCODED message as an attachment named Winmail.dat.

Check to see if the new Outlook toggle is turned on or off. If it's on, please go to Troubleshooting Outlook issues. The Microsoft Support and Recovery Assistant can help you automatically diagnose and fix a range of Outlook problems.

Set up email in the Mail app. Windows 11 Mail for Windows 10 Outlook Mail for Windows 10. If you have Windows 10 or a later version and you sign in with a Microsoft account that has an Outlook.com, Live, Hotmail, or MSN address, that account is added to the Mail and Calendar apps. You can add that email account and many other email accounts to ...

Troubleshoot attachment problems in Outlook. Change the file association for an email attachment. Instructions for opening attachments or saving them to your computer or cloud storage.

This article explains how to associate file types with the apps you use on your computer so you can open email attachments.

Moving a .pst file from one computer to another doesn't transfer your email account settings. If you need to set up Outlook on a new computer, copy your .pst file from the old computer, then set up your email account on your new computer. You can then open the .pst file from the new computer.